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https://issues.apache.org/jira/browse/YARN-2925?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14235788#comment-14235788
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Sunil G commented on YARN-2925:
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HI [~wangda]
Do you mean completely remove CS specific lock here, and protect only the data
structures with lock from LeafQueue?
> Internal fields in LeafQueue access should be protected when accessed from
> FiCaSchedulerApp to calculate Headroom
> -----------------------------------------------------------------------------------------------------------------
>
> Key: YARN-2925
> URL: https://issues.apache.org/jira/browse/YARN-2925
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Reporter: Wangda Tan
> Assignee: Wangda Tan
> Priority: Critical
>
> Upon YARN-2644, FiCaScheduler will calculation up-to-date headroom before
> sending back Allocation response to AM.
> Headroom calculation is happened in LeafQueue side, uses fields like used
> resource, etc. But it is not protected by any lock of LeafQueue, so it might
> be corrupted is someone else is editing it.
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